JPS4827661A - - Google Patents

Info

Publication number
JPS4827661A
JPS4827661A JP7496672A JP7496672A JPS4827661A JP S4827661 A JPS4827661 A JP S4827661A JP 7496672 A JP7496672 A JP 7496672A JP 7496672 A JP7496672 A JP 7496672A JP S4827661 A JPS4827661 A JP S4827661A
Authority
JP
Japan
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP7496672A
Other languages
Japanese (ja)
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed filed Critical
Publication of JPS4827661A publication Critical patent/JPS4827661A/ja
Pending legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G11/00—Limiting amplitude; Limiting rate of change of amplitude ; Clipping in general
    • H03G11/08—Limiting rate of change of amplitude
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/0405—Non-linear filters
    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B5/00—Recording by magnetisation or demagnetisation of a record carrier; Reproducing by magnetic means; Record carriers therefor
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G3/00—Gain control in amplifiers or frequency changers without distortion of the input signal
    • H03G3/20—Automatic control
    • H03G3/30—Automatic control in amplifiers having semiconductor devices
    • H03G3/34—Muting amplifier when no signal is present or when only weak signals are present, or caused by the presence of noise signals, e.g. squelch systems
    • H03G3/345—Muting during a short period of time when noise pulses are detected, i.e. blanking
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/18—Automatic control in untuned amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G5/00—Tone control or bandwidth control in amplifiers
    • H03G5/16—Automatic control
    • H03G5/24—Automatic control in frequency-selective amplifiers
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G7/00—Volume compression or expansion in amplifiers
    • H03G7/06—Volume compression or expansion in amplifiers having semiconductor devices
    • H03G7/08—Volume compression or expansion in amplifiers having semiconductor devices incorporating negative feedback
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03G—CONTROL OF AMPLIFICATION
    • H03G9/00—Combinations of two or more types of control, e.g. gain control and tone control
    • H03G9/02—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers
    • H03G9/025—Combinations of two or more types of control, e.g. gain control and tone control in untuned amplifiers frequency-dependent volume compression or expansion, e.g. multiple-band systems
    • H—ELECTRICITY
    • H03—ELECTRONIC CIRCUITRY
    • H03H—IMPEDANCE NETWORKS, e.g. RESONANT CIRCUITS; RESONATORS
    • H03H11/00—Networks using active elements
    • H03H11/02—Multiple-port networks
    • H03H11/04—Frequency selective two-port networks
    • H03H11/12—Frequency selective two-port networks using amplifiers with feedback
    • H03H11/1291—Current or voltage controlled filters
JP7496672A 1971-07-26 1972-07-26 Pending JPS4827661A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
US00166197A US3753159A (en) 1970-11-03 1971-07-26 Variable bandpass dynamic noise filter

Publications (1)

Publication Number Publication Date
JPS4827661A true JPS4827661A (en) 1973-04-12

Family

ID=22602206

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7496672A Pending JPS4827661A (en) 1971-07-26 1972-07-26

Country Status (6)

Country Link
US (2) US3678416A (en)
JP (1) JPS4827661A (en)
CA (1) CA964338A (en)
DE (1) DE2236709C2 (en)
FR (1) FR2147687A5 (en)
GB (1) GB1393690A (en)

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6116611A (en) * 1984-07-02 1986-01-24 Victor Co Of Japan Ltd Noise reducing circuit
JPH01143412A (en) * 1987-11-30 1989-06-06 Nec Eng Ltd Active filter

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JPS5640403B1 (en) * 1971-02-10 1981-09-21
US3911371A (en) * 1971-07-24 1975-10-07 Sony Corp Signal transmission system
US3755749A (en) * 1971-11-22 1973-08-28 White Instr Inc Sound reenforcement equalization system
US3835399A (en) * 1972-01-24 1974-09-10 R Holmes Adjustable electronic tunable filter with simulated inductor
FR2184481B1 (en) * 1972-05-18 1978-09-01 France Etat
DE2253696B1 (en) * 1972-11-02 1974-02-21 Electroacustic Gmbh, 2300 Kiel PROCESS FOR REDUCING INTERFERENCE VOLTAGE DURING MULTI-CHANNEL REPRODUCTION OF ACOUSTIC REPRESENTATIONS
US4184178A (en) * 1972-11-30 1980-01-15 Basf Aktiengesellschaft Drop-out compensator for sound reproducing apparatus during tape reversal
JPS5750097B2 (en) * 1973-06-06 1982-10-26
US3983505A (en) * 1974-04-10 1976-09-28 Victor Company Of Japan, Limited Signal frequency band control system
JPS579530B2 (en) * 1974-07-08 1982-02-22
US3889108A (en) * 1974-07-25 1975-06-10 Us Navy Adaptive low pass filter
US3947636A (en) * 1974-08-12 1976-03-30 Edgar Albert D Transient noise filter employing crosscorrelation to detect noise and autocorrelation to replace the noisey segment
US4076969A (en) * 1975-04-07 1978-02-28 Singer & Singer Impulse noise reduction system
US4155041A (en) 1976-05-13 1979-05-15 Burns Richard C System for reducing noise transients
US4099035A (en) * 1976-07-20 1978-07-04 Paul Yanick Hearing aid with recruitment compensation
US4135590A (en) * 1976-07-26 1979-01-23 Gaulder Clifford F Noise suppressor system
US4101849A (en) * 1976-11-08 1978-07-18 Dbx, Inc. Adaptive filter
US4143333A (en) * 1977-05-16 1979-03-06 David P. Misunas Impulse noise removing apparatus
US4207543A (en) * 1978-07-18 1980-06-10 Izakson Ilya S Adaptive filter network
DE2833590C2 (en) * 1978-07-31 1984-09-06 Il'ja Semenovič Izakson Adaptive filter
FR2448251A1 (en) * 1979-02-02 1980-08-29 Radiotechnique Compelec LOW-PASS FILTER FOR LOW FREQUENCY SIGNALS
US4254481A (en) * 1979-08-10 1981-03-03 Sperry-Sun, Inc. Borehole telemetry system automatic gain control
US4322641A (en) * 1979-12-11 1982-03-30 Packburn Electronics Noise reduction system
JPS56107648A (en) * 1980-01-30 1981-08-26 Sony Corp Noise reduction circuit
JPS56122243A (en) * 1980-02-29 1981-09-25 Victor Co Of Japan Ltd Noise reduction system
CA1184506A (en) * 1980-04-21 1985-03-26 Akira Komatsu Method and system for discriminating human voice signal
US4540946A (en) * 1980-06-06 1985-09-10 National Research Development Corp. Variable characteristic filters
JPS5746517A (en) * 1980-09-03 1982-03-17 Sony Corp Noise reduction circuit
JPS5752239A (en) * 1980-09-09 1982-03-27 Sony Corp Noise reducing circuit
JPS5752240A (en) * 1980-09-09 1982-03-27 Sony Corp Noise reducing circuit
FR2505579A1 (en) * 1981-05-08 1982-11-12 Agence France Presse METHOD FOR THE FILTER RECONSTRUCTION OF AN ANALOGUE SIGNAL FROM A PSEUDOANALOGIC SIGNAL OBTAINED BY DOUBLE DIGITAL / DIGITAL ANALOGUE / DIGITAL CONVERSION OF THE ANALOGUE SIGNAL WITH EVENTUALLY PROCESSING THE DIGITAL SIGNAL
US4453258A (en) * 1981-06-02 1984-06-05 Texas Instruments Incorporated Automatic gain control circuit
US4400584A (en) * 1982-04-05 1983-08-23 Motorola, Inc. Speakerphone for radio and, landline telephones
US4517602A (en) * 1982-10-18 1985-05-14 Rca Corporation Dynamic noise filter for an audio signal in a television
US4479250A (en) * 1983-06-10 1984-10-23 Motorola, Inc. Dual audio capture limiter squelch circuit
KR950015080B1 (en) * 1983-10-07 1995-12-21 돌비 래브러토리즈 라이센싱 코포레이션 Emphasis and de-emphasis
NL8402322A (en) * 1984-07-23 1986-02-17 Philips Nv DEVICE FOR DETECTING IMPULSE INTERFERENCES, AND A DEVICE FOR SUPPRESSING IMPULSE INTERFERENCES, INCLUDING DEVICE FOR DETECTING IMPULSE INTERFERENCES.
DE3516913C1 (en) * 1985-05-10 1986-10-02 Philips Patentverwaltung Gmbh, 2000 Hamburg Automatic FM sideband level control for video recorders
US4809338A (en) * 1985-07-05 1989-02-28 Harman International Industries, Incorporated Automotive sound system
US4750207A (en) * 1986-03-31 1988-06-07 Siemens Hearing Instruments, Inc. Hearing aid noise suppression system
US4809337A (en) * 1986-06-20 1989-02-28 Scholz Research & Development, Inc. Audio noise gate
US4759065A (en) * 1986-09-22 1988-07-19 Harman International Industries, Incorporated Automotive sound system
JPH07120923B2 (en) * 1986-12-27 1995-12-20 ソニー株式会社 Filter adjustment device
US4837832A (en) * 1987-10-20 1989-06-06 Sol Fanshel Electronic hearing aid with gain control means for eliminating low frequency noise
FR2623672A1 (en) * 1987-11-19 1989-05-26 Alcatel Thomson Radiotelephone DEVICE FOR ENHANCING LISTENING COMFORT BY REMOVING TRANSIENT PHENOMENA IN A RECEIVING CHAIN OF NARROWBAND FM / PM EQUIPMENT, IN PARTICULAR IN RADIOTELEPHONY
US5157289A (en) * 1991-07-29 1992-10-20 Grumman Aerospace Corporation FET adaptive limiter with high current FET detector
US5471527A (en) * 1993-12-02 1995-11-28 Dsc Communications Corporation Voice enhancement system and method
AU691554B2 (en) * 1994-03-09 1998-05-21 Nec Corporation Analog multiplier using multitail cell
US5550923A (en) * 1994-09-02 1996-08-27 Minnesota Mining And Manufacturing Company Directional ear device with adaptive bandwidth and gain control
JPH0944810A (en) * 1995-07-24 1997-02-14 Mitsubishi Electric Corp Signal reproducing circuit for mr head
US6178314B1 (en) 1997-06-27 2001-01-23 Visteon Global Technologies, Inc. Radio receiver with adaptive bandwidth controls at intermediate frequency and audio frequency sections
US6154547A (en) * 1998-05-07 2000-11-28 Visteon Global Technologies, Inc. Adaptive noise reduction filter with continuously variable sliding bandwidth
US6055318A (en) * 1998-05-07 2000-04-25 Ford Motor Company Adaptive noise reduction filter with low modulation disabling
US6115689A (en) * 1998-05-27 2000-09-05 Microsoft Corporation Scalable audio coder and decoder
US6175275B1 (en) * 1999-09-28 2001-01-16 Stmicroelectronics S.A. Preamplifier with an adjustable bandwidth
DE10124699C1 (en) * 2001-05-18 2002-12-19 Micronas Gmbh Circuit arrangement for improving the intelligibility of speech-containing audio signals
JP3901475B2 (en) * 2001-07-02 2007-04-04 株式会社ケンウッド Signal coupling device, signal coupling method and program
JP3793069B2 (en) * 2001-10-30 2006-07-05 三菱電機株式会社 Semiconductor device
US20040024596A1 (en) * 2002-07-31 2004-02-05 Carney Laurel H. Noise reduction system
KR100635699B1 (en) * 2002-07-31 2006-10-17 엔이씨 도낀 가부시끼가이샤 Transmission line type noise filter with reduced heat generation even when large dc current flows therein
US7266464B2 (en) * 2004-12-17 2007-09-04 Texaco Inc. Dynamic cut-off frequency varying filter
DE102006028006A1 (en) * 2006-06-14 2007-12-20 Siemens Ag Field device and method for processing at least one measured variable in a field device
EP2283408A2 (en) * 2008-05-13 2011-02-16 Igo, Inc. Circuit and method for ultra-low idle power
US7770039B2 (en) * 2008-05-29 2010-08-03 iGo, Inc Primary side control circuit and method for ultra-low idle power operation
US7779278B2 (en) * 2008-05-29 2010-08-17 Igo, Inc. Primary side control circuit and method for ultra-low idle power operation
US7795760B2 (en) * 2008-07-25 2010-09-14 Igo, Inc. Load condition controlled power module
US7795759B2 (en) * 2008-06-27 2010-09-14 iGo, Inc Load condition controlled power strip
US7800252B2 (en) * 2008-06-27 2010-09-21 Igo, Inc. Load condition controlled wall plate outlet system
US9324337B2 (en) * 2009-11-17 2016-04-26 Dolby Laboratories Licensing Corporation Method and system for dialog enhancement
JP2015149690A (en) * 2014-02-10 2015-08-20 ソニー株式会社 Signal processing device and method
US9692420B2 (en) * 2015-11-02 2017-06-27 Ess Technology, Inc. Programmable circuit components with recursive architecture
DE102017006980A1 (en) * 2017-07-22 2019-01-24 Leopold Kostal Gmbh & Co. Kg Method for detecting an approach to a sensor element
DE102017009705A1 (en) * 2017-10-18 2019-04-18 Leopold Kostal Gmbh & Co. Kg Method for detecting an approach to a sensor element
US11356072B2 (en) 2020-04-28 2022-06-07 Analog Devices, Inc. Customizable tunable filters

Family Cites Families (10)

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US2096760A (en) * 1936-04-03 1937-10-26 John Hays Hammond Jr Tone control system
US2413263A (en) * 1942-06-29 1946-12-24 William Ockrant Method and means for frequency control
BE420493A (en) * 1946-01-17
US2606969A (en) * 1946-01-17 1952-08-12 Myron T Smith Method and system for reducing noise in the transmission of electric signals
US2606970A (en) * 1946-01-19 1952-08-12 Myron T Smith Method of and system for reducing noise in the transmission of signals
US2606971A (en) * 1946-01-19 1952-08-12 Myron T Smith Method and system for reducing noise in the transmission of electric signals
US2638501A (en) * 1948-11-04 1953-05-12 Sidney B Colcman Electronic noise suppressor
US2589723A (en) * 1948-12-09 1952-03-18 Bendix Aviat Corp Noise suppressor for audio circuits
US3543191A (en) * 1968-06-18 1970-11-24 Warwick Electronics Inc Controllable filter network
US3644847A (en) * 1970-11-30 1972-02-22 Gen Motors Corp Frequency-following voltage-controlled filter providing substantially constant output amplitude

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6116611A (en) * 1984-07-02 1986-01-24 Victor Co Of Japan Ltd Noise reducing circuit
JPH0347011B2 (en) * 1984-07-02 1991-07-18 Victor Company Of Japan
JPH01143412A (en) * 1987-11-30 1989-06-06 Nec Eng Ltd Active filter
JPH0570330B2 (en) * 1987-11-30 1993-10-04 Nippon Electric Eng

Also Published As

Publication number Publication date
FR2147687A5 (en) 1973-03-09
DE2236709A1 (en) 1973-02-08
US3678416A (en) 1972-07-18
GB1393690A (en) 1975-05-07
US3753159A (en) 1973-08-14
DE2236709C2 (en) 1983-10-20
CA964338A (en) 1975-03-11

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